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Vasoconstriction. Vasoconstriction is the narrowing of the blood vessels resulting from contraction of the muscular wall of the vessels, in particular the large arteries and small arterioles. The process is the opposite of vasodilation, the widening of blood vessels. The process is particularly important in controlling hemorrhage and reducing ...
Blood vessels are the structures of the circulatory system that transport blood throughout the human body. [1] These vessels transport blood cells, nutrients, and oxygen to the tissues of the body. They also take waste and carbon dioxide away from the tissues. Blood vessels are needed to sustain life, because all of the body's tissues rely on ...
Sympathetic nervous system stimulation causes vasoconstriction of most blood vessels, including many of those in the skin, the digestive tract, and the kidneys. This occurs as a result of activation of alpha-1 adrenergic receptors by norepinephrine released by post-ganglionic sympathetic neurons.
"Vaso" comes from a Latin word meaning vessel, and "dilation" means to widen, hence vasodilation. ... When vasodilation occurs, blood vessels widen to increase blood flow. When vasoconstriction ...
It causes vasoconstriction in many blood vessels, including those of the skin, gastrointestinal system, kidney (renal artery) [16] and brain. [17] Other areas of smooth muscle contraction are: ureter; vas deferens; hair (arrector pili muscles) uterus (when pregnant) urethral sphincter; urothelium and lamina propria [18]
The word hemodynamics (/ ˌhiːmədaɪˈnæmɪks, - moʊ -/ [40]) uses combining forms of hemo- (which comes from the ancient Greek haima, meaning blood) and dynamics, thus "the dynamics of blood ". The vowel of the hemo- syllable is variously written according to the ae/e variation. Blood hammer. Blood pressure.
Local blood flow regulation. In physiology, acute local blood flow regulation refers to an intrinsic regulation, or control, of the vascular tone of arteries at a local level, meaning within a certain tissue type, organ, or organ system. This intrinsic type of control means that the blood vessels can automatically adjust their own vascular tone ...
Hemostasis. In biology, hemostasis or haemostasis is a process to prevent and stop bleeding, meaning to keep blood within a damaged blood vessel (the opposite of hemostasis is hemorrhage). It is the first stage of wound healing. Hemostasis involves three major steps: vasoconstriction.